XFA: Fix win8 gn build under chromium checkout (non-xfa)

third_party/bigint/BigIntegerUtils.cc

Index: third_party/bigint/BigIntegerUtils.cc
diff --git a/third_party/bigint/BigIntegerUtils.cc b/third_party/bigint/BigIntegerUtils.cc
index 2629028355ae8a412fed507b57c94d8f4f8bb6b8..f48334d9613a94ee60dde9477de50486c5203b1a 100644
--- a/third_party/bigint/BigIntegerUtils.cc
+++ b/third_party/bigint/BigIntegerUtils.cc
@@ -43,6 +43,7 @@ std::ostream &operator <<(std::ostream &os, const BigUnsigned &x) {
 			os << '0';
 	} else
         abort();
+
 	std::string s = std::string(BigUnsignedInABase(x, base));
 	os << s;
 	return os;